General changes for master

configure.ac

install

openfpm_data

openfpm_io

openfpm_numerics

src/Decomposition/CartDecomposition.hpp

src/Grid/grid_dist_id.hpp

src/Grid/grid_dist_id_iterator.hpp

src/Grid/grid_dist_key.hpp

src/Grid/staggered_dist_grid.hpp

src/Grid/staggered_dist_grid_util.hpp

src/Grid/staggered_grid_dist_unit_test.hpp

src/main.cpp